See my signature.
Got Alpine speakers and with a 3D printed adapter found in this forum, bigger ones in the back.
They sound better than the stock ones
2014 Spark EV no FC
Front Speakers: Alpine 4" (SPS410)
Back Speakers: Alpine 5X7" (SPS517) w 3D print adapters
17 " Rims
Front: Michelin Pilot Sport A/S 3 205/40R17
Back: Hankook 205/45R17
2016 Kia Soul EV no FC
2000 Honda Insight MT